31131652464 has 90 divisors (see below), whose sum is σ = 95765976488. Its totient is φ = 9433828800.

The previous prime is 31131652429. The next prime is 31131652469. The reversal of 31131652464 is 46425613113.

31131652464 is a `hidden beast` number, since 3 + 1 + 131 + 65 + 2 + 464 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31131652469) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 875932 + ... + 910779.

Almost surely, 2^31131652464 is an apocalyptic number.

It is an amenable number.

31131652464 is an abundant number, since it is smaller than the sum of its proper divisors (64634324024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31131652464 is a wasteful number, since it uses less digits than its factorization.

31131652464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786747 (or 1786727 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 31131652464 in words is "thirty-one billion, one hundred thirty-one million, six hundred fifty-two thousand, four hundred sixty-four".